1. Department of Medicine, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany
2. German Center for Infection Research (DZIF), Hamburg-Lübeck-Borstel-Riems and Heidelberg Partner Sites, 20251 Hamburg, Germany
3. Institute of Medical Biometry and Epidemiology, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany
4. Institute for Infection Research and Vaccine Development (IIRVD), University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany
5. Gastromedics Health Center, 7000 Eisenstadt, Austria